I have, and it's actually kinda dead now. Check the time stamp, their last update to the blog was a while ago. In the forums they mentioned that the original team members have kinda gotten too busy to work on it, and they released all their notes and resources to the public to continue, but no one's done anything as far as I've seen. Plus their latest release (which is still kinda old) doesn't even work properly on anything above 10.6 for Mac, due to a lack of X11 support.
In other words, you've kinda missed the party.
As of february 2015 it is alive again. The engine and scripting could be realy cool. The base scenario content is pretty uninteresting though, and there's no plugin architecutre yet, but lot's of potential now. Works on OSX again.